QUEBEC HEAVY VEHICLE KNOWLEDGE TEST 03

As a commercial driver in Quebec, Canada, it is vital to understand and abide by the strict traffic rules that govern the transport industry.

Quebec Commercial Driver Test 03

1 / 30

Air brake systems might operate at different pressure levels, but the difference in pressure between when the air compressor starts and stops operating is always the same. It is:

114 kPa

138 kPa

152 kPa

176 kPa

2 / 30

When is jackknifing most likely to occur?

When the brake linings are worn down

When the angle between the push rod and the slack adjuster is 90Â°

When the anti-lock braking system comes into play because the driver is attempting to stop urgently

When the space between the brake lining and the brake drums is too large

3 / 30

If you are making a turn in a heavy vehicle, when is the correct time to accelerate?

As you come out of the turn

As you enter the turn

As you are about halfway through the intersection

Any time, as long as you have checked your rearview mirror and blind spots

4 / 30

When the brake pedal has been applied, what happens immediately after compressed air pushes on the diaphragm of the brake chamber?

The push rod is pushed

The brake shoes come into contact with the drum

The S-cam is rotated

The brake shoes are pulled apart

5 / 30

If you doing a brake adjustment inspection, what is the sign that your brake(s) needs to be adjusted?

If the brakes on the same axle have identical push rod travel measurements

If the push rod is coming out of the brake chamber

If pulling the slack adjuster requires considerable strength

If the push road travel is more than 19mm

6 / 30

The emergency brake will take over and bring the vehicle to a stop when the pressure in the service brakes drops below:

446 kPa

380 kPa

550 kPa

242 kPa

7 / 30

As a responsible driver, you should look ahead over the distance you will be covering in the next:

12-15 seconds

17-20 seconds

3-6 seconds

5-8 seconds

8 / 30

Which of the following is not an appropriate use for the trailer hand brake?

To check that the semitrailer is properly hitched

As an alternative option if you want to reduce wear on the parking brake

To bring the semitrailer to a stop during the hitching process

To check that the service brakes of the trailer are working after being hitched

9 / 30

What is best practice for using your supplemental brakes when going down a hill with a loaded vehicle?

Flip the engine brake switch and then apply constant force to the brake pedal

Ensure you are in the low gear range, flip the engine brake switch and take your foot off the accelerator

Upshift to the high gear range and flip the engine brake switch

Apply a steady amount of force on the accelerator and then flip the engine brake switch

10 / 30

If you are carrying a heavy load, why is it important to increase your stopping distance rather than increasing your braking power when bringing the vehicle to a stop?

To prevent the air pressure in the service reservoirs from dropping too low

To prevent the brakes from overheating

To prevent the over-rotation of the S-cam

To prevent the brake chambers from filling with too much air

11 / 30

What mechanism causes the vehicle to slow down in a drum brake system when the driver presses the brake pedal?

Air in the supply reservoirs is released, activating an air purifier

The S-cam drives a rod which causes a slack adjuster to make the brakes clamp

Air in the brake chambers is emptied, which squeezes strong return springs

Two brake shoes covered with linings press against the drum

12 / 30

If the low pressure light comes on, indicating that your service brake system is failing, what should you do?

Pull the parking brake control out immediately

Within a few seconds, choose somewhere safe to stop your vehicle

Find the best spot to pull over within the next 5km

Flip the switch to activate the engine brakes, as these will stop the vehicle

13 / 30

Which is not a major factor contributing to 'brake fading'?

Improper brake adjustment

Excessive force on the brake pedal

Prolonged braking distance

Continuous and unnecessary 'riding' of the brakes

14 / 30

How is compressed air supplied to a semitrailer's reservoirs?

From the compressor

From the supply reservoir of the truck or tractor

From the two service reservoirs of the truck or tractor

From the emergency reservoir

15 / 30

What is an essential guideline to follow when negotiating a curve?

Always look to the right when you are navigating a curve

Change gears only after you enter the curve

Avoid braking in curves

Avoid accelerating in curves

16 / 30

Which of the following is not one of the factors determining the braking power?

Radius of the brake shoes

Length of the slack adjuster

Size of the diaphragm

Rotation of the S-cam

17 / 30

Retarders will:

Work well in any gear

Slow down but not stop your vehicle

Do the same thing as a runaway lane if your brakes fail

Automatically be operable

18 / 30

What is the correct way to ensure you are following the vehicle in front at a safe distance:

Get very close to the vehicle in front and then slowly apply the brakes and count to 4 seconds

Estimate the length of the vehicle you are trailing and ensure there are about four of those vehicle lengths in between you

Leave one second for every three metres of your vehicle's length and count out the seconds using a stationary object at the side of the road

Turn on your high beams and check that the vehicle in front is at least beyond the range of the beams

19 / 30

What does the acronym GVWR stand for?

Gross Vehicle Weight Rating

Gross Volume Weight Restriction

Gear Valve Wear Resistance

Grid Voltage Wheel Rotation

20 / 30

What happens when the parking brake knob is pushed in?

Compressed air fills the brake chambers

The trailer brakes become clamped

The air supply control is activated

Compressed air is released from the brake chambers

21 / 30

Which of the sequences below correctly describes how air from the outside of the vehicle travels through the brake system?

Air filter; supply reservoir; service reservoirs; air compressor; brake chambers

Air compressor; air filter; supply reservoir; service reservoirs; brake chambers

Brake chambers; service reservoirs; supply reservoir; air filter; air compressor

Supply reservoir; service reservoirs; air compressor; brake chambers; air filter

22 / 30

What would two needles in an air pressure gauge indicate?

The minimum and maximum amount of air pressure that gets into the brake chambers when the brakes are applied

The amount of air pressure that gets into the brake chambers when the brakes are applied

The minimum and maximum air pressure in the service reservoirs

The amount of air pressure in the service reservoirs for each of the circuits

23 / 30

If an air compressor begins operating when the air pressure in the service reservoirs drops below 714 kPa, then the air compressor will stop filling them when the pressure reaches:

890 kPa

852 kPa

828 kPa

866 kPa

24 / 30

What does the air pressure gauge tell you?

How much air pressure there is in the service reservoirs

The difference in pressure between the two brake circuits

How much compressed air pressure gets into the chambers when the brakes are applied

The air pressure travelling via brake hoses between adjoining trailers

25 / 30

Which of the following statements is true about the primary and secondary circuits of an air brake system?

One circuit cannot work without the other

The driver controls the two circuits separately

The two circuits work independently

The two circuits work in synchronicity

26 / 30

Why is it important for drivers to know about brake lag?

Fluid in hydraulic brakes is compressed more easily than air

Driver reaction time is longer with air brakes

Air brake systems generally require longer stopping distance than hydraulic systems

Hydraulic brakes react less quickly than air brakes to the application of the brake pedal

27 / 30

Which of the following situations could prevent you from clearing an overpass even if your vehicle is shorter than the height indicated?

There is a thick amount of packed snow on the roads

There is a sign indicating strong crosswinds in the area

There is vehicle coming from the other direction

There is a heavy load inside your trailer

28 / 30

What is the purpose of an air purifier in an air brake system?

It reduces the frequency with which you need to bleed the air reservoirs

It removes the need to bleed the air reservoirs

It makes the bleeding process more complicated

It reduces the time required to bleed the air reservoirs

29 / 30

When entering a right curve in a heavy vehicle, the driver should:

Aim to keep the vehicle aligned in the centre of the lane

Keep the front of the vehicle closer to the centre line or the left side of the lane

Keep the front of the vehicle closer to the right side of the road

Use his or her mirrors to monitor the path of the rear wheels

30 / 30

How often should you be checking your rearview mirrors?

For about 5-6 seconds straight every minute to get a full grasp of what is happening behind you

Before changing lanes to see if anyone is in your blind spots

Only to see if cargo is still secured

Quick glances every 10-12 seconds and to complete manoeuvres safely

Your score is

Some of these rules include mandatory vehicle inspections, strict speed limits, and adherence to hours of service regulations. Commercial drivers must also have a Commercial Driver’s License (CDL) obtained after passing various tests to assess knowledge and skill levels. Commercial drivers need to be aware of the rules of the road, such as yielding to pedestrians, obeying traffic signals, and avoiding distracted driving. Ignoring these rules can have severe consequences, including fines, license suspensions, and even imprisonment in some cases. Furthermore, commercial drivers are subject to stricter blood-alcohol limits and may be required to undergo regular drug and alcohol testing to ensure safety on the road. By following such regulations, commercial drivers can help prevent accidents and injuries while operating their vehicles in Quebec.

To begin your career in commercial driving, you must obtain your Quebec Class 1, Class 2, Class 3, or Class 4 Heavy Vehicle Driver Licence.
These online practice tests were developed to help individuals study for their Heavy Vehicle driver’s licence. Our practice testing area is designed to help you learn the information on your actual written knowledge test and familiarize you with the testing format. All testing material is covered in official Quebec’s ‘Driving a Heavy Vehicle‘ manual.